java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:16:49,127 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:16:49,130 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:16:49,142 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:16:49,142 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:16:49,143 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:16:49,144 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:16:49,146 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:16:49,150 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:16:49,156 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:16:49,157 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 12:16:49,191 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-02 12:16:49,218 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:16:49,218 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:16:49,219 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:16:49,219 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:16:49,220 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:16:49,220 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:16:49,220 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:16:49,220 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:16:49,220 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:16:49,221 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:16:49,221 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:16:49,221 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:16:49,221 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:16:49,221 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:16:49,221 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:16:49,222 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:16:49,222 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:16:49,222 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:16:49,222 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:16:49,222 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:16:49,223 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:16:49,223 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:16:49,223 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:16:49,223 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:16:49,223 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:16:49,224 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:16:49,224 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:16:49,224 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:16:49,224 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:16:49,224 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:16:49,225 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:16:49,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:16:49,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:16:49,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:16:49,297 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:16:49,297 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:16:49,298 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl [2018-10-02 12:16:49,298 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl' [2018-10-02 12:16:49,348 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:16:49,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:16:49,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:16:49,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:16:49,353 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:16:49,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... [2018-10-02 12:16:49,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... [2018-10-02 12:16:49,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:16:49,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:16:49,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:16:49,391 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:16:49,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... [2018-10-02 12:16:49,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... [2018-10-02 12:16:49,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... [2018-10-02 12:16:49,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... [2018-10-02 12:16:49,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... [2018-10-02 12:16:49,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... [2018-10-02 12:16:49,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... [2018-10-02 12:16:49,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:16:49,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:16:49,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:16:49,412 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:16:49,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:16:49,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 12:16:49,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 12:16:49,657 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 12:16:49,657 INFO L202 PluginConnector]: Adding new model simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:16:49 BoogieIcfgContainer [2018-10-02 12:16:49,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:16:49,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:16:49,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:16:49,662 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:16:49,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:16:49" (1/2) ... [2018-10-02 12:16:49,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fc52 and model type simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:16:49, skipping insertion in model container [2018-10-02 12:16:49,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:16:49" (2/2) ... [2018-10-02 12:16:49,665 INFO L112 eAbstractionObserver]: Analyzing ICFG simple1.i_3.bpl [2018-10-02 12:16:49,675 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:16:49,684 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:16:49,725 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:16:49,726 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:16:49,726 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:16:49,727 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:16:49,727 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:16:49,727 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:16:49,727 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:16:49,727 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:16:49,728 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:16:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 12:16:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 12:16:49,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:49,747 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 12:16:49,749 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:49,755 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:49,756 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-02 12:16:49,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:49,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:49,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:49,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:16:49,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:49,920 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:16:49,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 12:16:49,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:16:49,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:16:49,938 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:49,939 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 12:16:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:50,055 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-02 12:16:50,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:16:50,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 12:16:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:50,083 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:16:50,083 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 12:16:50,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:16:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 12:16:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 12:16:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 12:16:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 12:16:50,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-02 12:16:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:50,147 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 12:16:50,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:16:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 12:16:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 12:16:50,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:50,148 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-02 12:16:50,149 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:50,149 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:50,149 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-02 12:16:50,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:50,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:50,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:50,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:16:50,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:50,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:50,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:50,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:16:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:50,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:50,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:50,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 12:16:50,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 12:16:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 12:16:50,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:50,350 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-02 12:16:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:50,487 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:16:50,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:16:50,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 12:16:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:50,488 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:16:50,488 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 12:16:50,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:16:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 12:16:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 12:16:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 12:16:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 12:16:50,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-02 12:16:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:50,493 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 12:16:50,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 12:16:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 12:16:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 12:16:50,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:50,495 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-02 12:16:50,495 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:50,495 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:50,496 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-02 12:16:50,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:50,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:50,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:50,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:16:50,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:50,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:50,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:50,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:16:50,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:16:50,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:50,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:50,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:50,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 12:16:50,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 12:16:50,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 12:16:50,775 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:50,775 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-02 12:16:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:51,142 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 12:16:51,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:16:51,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 12:16:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:51,143 INFO L225 Difference]: With dead ends: 13 [2018-10-02 12:16:51,143 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 12:16:51,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:16:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 12:16:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 12:16:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:16:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 12:16:51,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-02 12:16:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:51,148 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 12:16:51,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 12:16:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 12:16:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 12:16:51,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:51,150 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-02 12:16:51,150 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:51,150 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:51,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-02 12:16:51,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:51,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:51,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:51,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:51,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:51,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:51,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:51,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:16:51,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 12:16:51,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:51,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:51,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:51,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 12:16:51,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 12:16:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 12:16:51,426 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:51,427 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-02 12:16:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:51,680 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 12:16:51,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:16:51,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-02 12:16:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:51,683 INFO L225 Difference]: With dead ends: 15 [2018-10-02 12:16:51,685 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 12:16:51,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:16:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 12:16:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 12:16:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 12:16:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 12:16:51,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-02 12:16:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:51,692 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 12:16:51,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 12:16:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 12:16:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 12:16:51,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:51,693 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-02 12:16:51,694 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:51,694 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:51,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-02 12:16:51,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:51,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:51,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:51,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:51,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:51,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:51,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:51,854 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:16:51,865 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:16:51,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:51,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:52,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:52,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 12:16:52,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 12:16:52,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 12:16:52,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:52,002 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-02 12:16:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:52,594 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 12:16:52,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:16:52,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-02 12:16:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:52,596 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:16:52,596 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 12:16:52,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:16:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 12:16:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 12:16:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 12:16:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 12:16:52,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-02 12:16:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:52,602 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 12:16:52,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 12:16:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 12:16:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 12:16:52,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:52,604 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-02 12:16:52,604 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:52,604 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-02 12:16:52,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:52,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:52,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:52,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:52,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:52,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:52,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:52,782 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:16:52,819 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 12:16:52,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:52,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:52,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:52,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 12:16:52,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:16:52,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:16:52,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:52,904 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-02 12:16:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:53,184 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 12:16:53,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:16:53,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-02 12:16:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:53,186 INFO L225 Difference]: With dead ends: 19 [2018-10-02 12:16:53,186 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 12:16:53,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:16:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 12:16:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 12:16:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 12:16:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 12:16:53,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-02 12:16:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:53,191 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 12:16:53,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:16:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 12:16:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 12:16:53,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:53,193 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-02 12:16:53,193 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:53,193 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-02 12:16:53,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:53,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:53,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:53,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:53,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:53,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:53,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:53,372 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:16:53,408 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 12:16:53,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:53,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:53,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:53,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 12:16:53,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 12:16:53,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 12:16:53,596 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:53,596 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-02 12:16:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:54,137 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 12:16:54,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:16:54,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 12:16:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:54,141 INFO L225 Difference]: With dead ends: 21 [2018-10-02 12:16:54,142 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 12:16:54,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:16:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 12:16:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 12:16:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 12:16:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 12:16:54,146 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-02 12:16:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:54,147 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 12:16:54,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 12:16:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 12:16:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 12:16:54,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:54,148 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-02 12:16:54,148 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:54,148 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:54,148 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-02 12:16:54,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:54,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:54,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:54,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:54,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:54,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:54,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:54,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:16:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:54,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:54,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:54,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 12:16:54,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:16:54,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:16:54,500 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:54,500 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-02 12:16:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:55,047 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 12:16:55,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:16:55,049 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 12:16:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:55,049 INFO L225 Difference]: With dead ends: 23 [2018-10-02 12:16:55,050 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 12:16:55,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:16:55,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 12:16:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 12:16:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 12:16:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 12:16:55,055 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-02 12:16:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:55,055 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 12:16:55,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:16:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 12:16:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 12:16:55,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:55,056 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-02 12:16:55,057 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:55,057 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-02 12:16:55,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:55,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:55,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:55,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:16:55,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:55,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:55,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:55,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:16:55,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:16:55,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:55,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:55,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:55,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 12:16:55,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 12:16:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 12:16:55,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:55,421 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-02 12:16:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:56,066 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 12:16:56,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:16:56,067 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-02 12:16:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:56,068 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:16:56,069 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 12:16:56,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:16:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 12:16:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 12:16:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 12:16:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 12:16:56,075 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-02 12:16:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:56,076 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 12:16:56,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 12:16:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 12:16:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 12:16:56,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:56,077 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-02 12:16:56,077 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:56,077 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:56,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-02 12:16:56,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:56,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:56,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:56,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:56,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:56,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:56,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:56,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:16:56,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 12:16:56,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:56,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:56,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:56,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 12:16:56,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:16:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:16:56,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:56,643 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-02 12:16:57,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:57,205 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 12:16:57,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:16:57,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-02 12:16:57,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:57,207 INFO L225 Difference]: With dead ends: 27 [2018-10-02 12:16:57,207 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 12:16:57,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:16:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 12:16:57,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 12:16:57,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 12:16:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 12:16:57,214 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-02 12:16:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:57,214 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 12:16:57,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:16:57,214 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 12:16:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 12:16:57,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:57,215 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-02 12:16:57,215 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:57,216 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:57,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-02 12:16:57,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:57,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:57,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:57,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:57,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:57,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:57,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:57,490 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:16:57,528 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:16:57,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:57,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:57,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:57,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 12:16:57,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 12:16:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 12:16:57,690 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:57,690 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-02 12:16:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:58,484 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 12:16:58,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:16:58,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-02 12:16:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:58,486 INFO L225 Difference]: With dead ends: 29 [2018-10-02 12:16:58,486 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 12:16:58,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:16:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 12:16:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 12:16:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 12:16:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 12:16:58,492 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-02 12:16:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:58,492 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 12:16:58,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 12:16:58,492 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 12:16:58,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 12:16:58,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:58,493 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-02 12:16:58,493 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:58,494 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-02 12:16:58,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:58,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:58,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:58,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:58,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:58,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:58,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:58,727 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:40,044 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 12:18:40,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:51,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:51,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:51,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 12:18:51,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:18:51,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:18:51,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:51,576 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-02 12:18:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:52,194 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 12:18:52,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:18:52,196 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-02 12:18:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:52,197 INFO L225 Difference]: With dead ends: 31 [2018-10-02 12:18:52,197 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 12:18:52,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime [2018-10-02 12:18:52,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 12:18:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 12:18:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 12:18:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 12:18:52,202 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-02 12:18:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:52,202 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 12:18:52,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:18:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 12:18:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 12:18:52,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:52,203 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-02 12:18:52,204 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:52,204 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:52,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-02 12:18:52,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:52,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:52,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:52,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:52,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:52,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:52,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:52,478 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:19:01,108 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:19:01,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:01,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:01,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:01,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 12:19:01,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 12:19:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 12:19:01,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:01,266 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-02 12:19:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:02,008 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 12:19:02,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:19:02,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-02 12:19:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:02,010 INFO L225 Difference]: With dead ends: 33 [2018-10-02 12:19:02,010 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 12:19:02,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:19:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 12:19:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 12:19:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 12:19:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 12:19:02,015 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-02 12:19:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:02,016 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 12:19:02,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 12:19:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 12:19:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 12:19:02,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:02,017 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-02 12:19:02,017 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:02,017 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-02 12:19:02,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:02,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:02,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:02,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:02,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:02,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:02,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:02,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:02,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:02,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:02,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 12:19:02,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:19:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:19:02,596 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:02,597 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-02 12:19:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:03,563 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 12:19:03,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:19:03,563 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-02 12:19:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:03,564 INFO L225 Difference]: With dead ends: 35 [2018-10-02 12:19:03,564 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 12:19:03,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:19:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 12:19:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 12:19:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 12:19:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 12:19:03,572 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-02 12:19:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:03,572 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 12:19:03,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:19:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 12:19:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 12:19:03,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:03,573 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-02 12:19:03,573 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:03,574 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:03,574 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-02 12:19:03,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:03,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:03,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:03,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:03,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:03,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:03,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:03,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:04,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:04,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:04,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:04,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:04,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 12:19:04,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 12:19:04,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 12:19:04,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:04,589 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-02 12:19:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:05,542 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 12:19:05,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:19:05,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-02 12:19:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:05,543 INFO L225 Difference]: With dead ends: 37 [2018-10-02 12:19:05,544 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 12:19:05,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.2s impTime [2018-10-02 12:19:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 12:19:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 12:19:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:19:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 12:19:05,549 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-02 12:19:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:05,549 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 12:19:05,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 12:19:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 12:19:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:19:05,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:05,550 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-02 12:19:05,551 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:05,551 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:05,551 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-02 12:19:05,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:05,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:05,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:05,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:05,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:06,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:06,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:06,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:51,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 12:19:51,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:51,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:51,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:51,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 12:19:51,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:19:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:19:51,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:51,974 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-02 12:19:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:53,011 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 12:19:53,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:19:53,012 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-02 12:19:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:53,013 INFO L225 Difference]: With dead ends: 39 [2018-10-02 12:19:53,013 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 12:19:53,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime [2018-10-02 12:19:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 12:19:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 12:19:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 12:19:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 12:19:53,019 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-02 12:19:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:53,019 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 12:19:53,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:19:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 12:19:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 12:19:53,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:53,020 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-02 12:19:53,021 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:53,021 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:53,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-02 12:19:53,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:53,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:53,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:53,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:53,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:53,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:53,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:53,411 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:19:53,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:19:53,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:53,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:53,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:53,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 12:19:53,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 12:19:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 12:19:53,587 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:53,587 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-02 12:19:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:54,708 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 12:19:54,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:19:54,717 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-02 12:19:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:54,717 INFO L225 Difference]: With dead ends: 41 [2018-10-02 12:19:54,717 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 12:19:54,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:19:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 12:19:54,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 12:19:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 12:19:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 12:19:54,723 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-02 12:19:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:54,723 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 12:19:54,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 12:19:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 12:19:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 12:19:54,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:54,725 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-02 12:19:54,725 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:54,726 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:54,726 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-02 12:19:54,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:54,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:54,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:54,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:54,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:55,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:55,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:55,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown